<template>
<el-container class='home-container'>
  <!-- 头部区域 -->
  <el-header>
   <div>
     <img src="../assets/logo.png" alt="">
     <span>电商后台管理系统</span>
   </div>
    <el-button type='info' @click="logout">退出</el-button></el-header>
  <!-- 页面主体区域 -->
  <el-container>
    <!-- 侧边栏 -->
    <el-aside :width="isCollapse? '64px':'200px'">
      <div class="toggle-button" @click="toggleCollapse">|||</div>
      <!-- 侧边栏菜单区域 -->
      <el-menu
      background-color="#333744"
      text-color="#fff"
      active-text-color="#409eff" unique-opened
      :collapse='isCollapse' :collapse-transition='false' router :default-active='activePath'>
      <!-- 一级菜单 -->
      <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id">
        <!-- 一级菜单的模板区 -->
        <template slot="title">
          <!-- 图标 -->
          <i :class="iconsObj[item.id]"></i>
          <!-- 文本 -->
          <span>{{item.authName}}</span>
        </template>
        <!-- 二级菜单 -->
        <el-menu-item :index="'/'+subItem.path+''" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/'+subItem.path)">
          <template slot="title">
          <!-- 图标 -->
          <i class="el-icon-menu"></i>
          <!-- 文本 -->
          <span>{{subItem.authName}}</span>
        </template>
        </el-menu-item>
      </el-submenu>
    </el-menu>
    </el-aside>
    <!-- 右侧内容主体 -->
    <el-main>
      <!-- 路由占位符 -->
      <router-view></router-view>
    </el-main>
  </el-container>
</el-container>
</template>

<script>
export default {
  name:'Home',
  data() {
    return {
      menulist:[],
      iconsObj:{
        '125':'el-icon-user',
        '103':'el-icon-setting',
        '101':'el-icon-s-goods',
        '102':'el-icon-shopping-bag-1',
        '145':'el-icon-postcard',
      },
      // 是否折叠
      isCollapse:false,
      // 被激活的链接地址
      activePath:''
    }
  },
  created() {
    this.getMenuList()
    this.activePath=window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout(){
      // 清空token
      window.sessionStorage.clear();
      // 跳转登录页
      this.$router.push('/login')
    },
   async getMenuList(){
      const {data:res} =await this.$http.get('menus');
      console.log(res)
      if(res.meta.status!==200) return this.$message.error(res.meta.msg);
      this.menulist=res.data;
    },
    toggleCollapse(){
      this.isCollapse=!this.isCollapse;
    },
    // 保存链接的激活项
    saveNavState(activePath){
      window.sessionStorage.setItem('activePath',activePath)
      this.activePath=activePath;
   }
  },
}
</script>

<style lang="less" scoped>
.home-container{
  height: 100%;

}
.el-header{
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div{
    display: flex;
    align-items: center;
    span{
      margin-left: 15px;
    }
  }
}
.el-aside{
  background-color: #333744;
  .el-menu{
    border-right: none;
  }
}
.el-mian{
  background-color: #eaedf1;
}
.iconfont{
  margin-right: 10px;
}
.toggle-button{
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 1.2em;
  cursor: pointer;
}
</style>